function CenterPopup(Link,hoehe,breite) { 
	var iMyWidth = (window.screen.width/2) - (breite/2 + 10); 
	var iMyHeight = (window.screen.height/2) - (hoehe/2 + 50); 
	var win2 = window.open(Link	,"popup","toolbar=no,location=no,status=no,menubar=no,scrollbars=no,resizable=no,width="
				+ breite + ",height=" + hoehe + ",left=" + iMyWidth + ",top=" +	iMyHeight + ",screenX=" + iMyWidth + ",screenY=" + iMyHeight); 
	win2.focus(); 
}